CN106592430B - A kind of cast-in-place winter construction method of Hanging Basket cantilever - Google Patents
A kind of cast-in-place winter construction method of Hanging Basket cantilever Download PDFInfo
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- CN106592430B CN106592430B CN201611000135.3A CN201611000135A CN106592430B CN 106592430 B CN106592430 B CN 106592430B CN 201611000135 A CN201611000135 A CN 201611000135A CN 106592430 B CN106592430 B CN 106592430B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/10—Cantilevered erection
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of cast-in-place winter construction method of Hanging Basket cantilever, it is comprised the following steps that：（1）Paste fire-retardant extruded sheet in the outer surface of hanging basket formwork；（2）Hot water circuit pipeline is laid on the outside of fire-retardant extruded sheet；（3）Extruded sheet and hot water circuit pipeline are fixed on rib in length and breadth by the way that reinforcing bar point is welded in template；（4）Integrally wrapped up using canvas cantilever segment；（5）Electric heating impact gun heats beam body template and reinforcing bar；（6）Arrange temperature measuring point；（7）Pour segment concrete；（8）Film and cotton-wadded quilt covering newly pour beam section concrete；（9）Two cantilever end of box beam T structures is using fire prevention rock cotton board closure；（10）Heated up in chamber using coal stove, while steam is conveyed into chamber using electric steam generator；（11）Tensioning mud jacking.The method of the present invention step is simple, easy construction, construction quality are easy to ensure；Using effect is good and practical value is high.
Description
Technical field
The present invention relates to bridge cast-in-situ box-beam technical field of construction, is specifically a kind of cast-in-place winter construction side of Hanging Basket cantilever
Method.
Background technology
According to specification, when stabilization is less than 5 DEG C to outdoor daily mean temperature round the clock within continuous 5 days, i.e., into winter construction.Because
The box beam of teletostage cradle cantilever construction be one positioned at the constantly mobile space structure in high-altitude, concrete transportation and pour more tired
Difficulty, construction risk bigger, puts into higher.Therefore, need to design a kind of step simple, easy construction, good economy performance, it is safe,
The method that construction quality is easy to ensure ensures the cast-in-place construction of teletostage box beam Hanging Basket cantilever
The content of the invention
It is an object of the invention to provide one kind to combine three kinds of regenerative process, steam heating and construction " heating house method " maintenance sides
The cast-in-place winter construction method of Hanging Basket cantilever of formula.
To achieve the above object, the present invention provides following technical solution：
A kind of cast-in-place winter construction method of Hanging Basket cantilever, it is comprised the following steps that：
(1) fire-retardant extruded sheet is pasted in the outer surface of hanging basket formwork flange plate, side form and bed die：Fire-retardant extruded sheet embedded template
In length and breadth between rib；
(2) hot water circuit pipeline is laid on the outside of fire-retardant extruded sheet：Hot water is laid with 25cm spacing on the outside of fire-retardant extruded sheet
Circulating line, conveys hot water by hot-water boiler and carries out circulating-heating, keep the temperature of template outer space；
(3) extruded sheet and hot water circuit pipeline are fixed on rib in length and breadth by the way that reinforcing bar point is welded in template：Using 8 reinforcing bars of Φ with
Template in length and breadth fix by rib spot welding；
(4) cantilever segment is integrally wrapped up using canvas：Cantilever segment template appearance fixes extruded sheet and hot-water circulation pipe
It is overall to be wrapped up using canvas behind road, ensure the overall wind shielding effect of box girder segment, reduce the convection current with outside air, it is ensured that is new
Pour the heat-accumulating and-keeping effect of beam section；
(5) electric heating impact gun heats beam body template and reinforcing bar：Ensure concrete enter mould front template, reinforcing bar temperature is not less than
5 DEG C, in addition, casting concrete surface pour leaching with hot water to upper segment cantilever end section, ensure engaging portion between segment
Temperature is more than 5 DEG C；
(6) temperature measuring point is arranged：Set temperature sensor is arranged as temperature measuring point, temperature measuring point in box beam before concreting
Worst position is being kept the temperature, in case carrying out temperature monitoring during maintenance to beam body concrete, i.e., flange plate left and right sides respectively sets 1, top
1 is set in plate, 1 is set in bottom plate, each at the web of left and right to set 2, one group amounts to 8 temperature measuring points, using thermometric line,
Web and bottom plate thermometric line are uniformly guided in chamber, and top plate thermometric line is drawn by top plate；
(7) segment concrete is poured：Concreting selection is carried out in the day temperature higher period, is conducive to concrete and is entered
The control of mould temperature；
(8) film and cotton-wadded quilt covering newly pour beam section concrete：The relatively thin easily heat dissipation of structure is endured cold at box beam flange plate,
On the edge of a wing, plate top surface first covers layer of plastic film, then installs electric blanket additional on it, then covers cotton-wadded quilt, to strengthen flange plate portion
Position insulation；
(9) two cantilever end of box beam T structures is using fire prevention rock cotton board closure；
(10) heated up in chamber using coal stove, while steam is conveyed into chamber using electric steam generator：Altogether 4
Platform coal stove, daily coal fire furnace roof place a stainless steel bucket, play humidification and thermogenic action；Pour in rear cabinet room and persistently add
It is hot and steam-cured, ensure to provide humidity with steam while temperature, it is ensured that the temperature inside the box is not less than 5 DEG C, and keeps case indoor temperature
Substantially constant；Gas poisoning and the excessive carbonization for accelerating concrete of gas concentration lwevel in order to prevent, must be the exhaust of stove
Outside pipe outlet box room；
(11) tensioning mud jacking：Hanging Basket segment concrete strength carries out tensioning mud jacking after reaching design requirement, and mud jacking mix is used
Water uses mixing plant hot-water supply, and temperature ensures slurry temperature more than 15 DEG C, while prevent that temperature is excessive right at 30 DEG C or so
Slurry impacts, and with 48h after mud jacking during mud jacking, the temperature of structural concrete must not be less than 5 DEG C, and insulation should extend to
After grouting and intensity reach 25MPa after could stop, duct grouting should carry out under positive temperature, before its intensity reaches 25MPa, no
It must endure cold, the quality accident being damaged by frost in order to prevent after box beam concrete grouting occurs, and spy is pressed using low temperature resistant grouting material
Test block test is starched, to ensure squeezing quality.
As the further scheme of the present invention：Extruded sheet described in step (1) is B1 grades of fire-retardant extruded sheets.
As the further scheme of the present invention：Hot water circuit pipeline described in step (2) uses diameter 20mm floor heating pipes.
As the further scheme of the present invention：When fixing extruded sheet using 8 reinforcing bar spot welding of Φ described in step (3), it should keep away
Exempt from electric spark and touch extruded sheet.
As the further scheme of the present invention：Canvas described in step (4) is each containing duck, canvas periphery spacing 50cm
If binding strap 1, binding strap should not leaked out away from canvas edge 30cm with ensuring that adjacent canvas is overlapping after binding；Cantilever end end
Portion's canvas to hanging from flange plate both sides along bridge with forming the keeping warmth space of closing after canvas is bound；To prevent strong wind from scraping canvas
Walk or scratch, binding strap should be bound firm with hanging basket formwork on the inside of canvas.
As the further scheme of the present invention：Electric heating impact gun described in step (5) is 30kW industrial air heaters.
As the further scheme of the present invention：There is the temperature of temperature sensor monitors described in step (6)：Outside air temperature,
Each observation station temperature in case indoor air temperature, concrete opening temperature, concrete molding temperature and box beam entity.
As the further scheme of the present invention：Concrete molding temperature described in step (7) is 5~30 DEG C；Pour the time
It is arranged in the morning on daytime 9:00 to afternoon 16:00；Before pouring, the residue on reinforcing bar and template is cleaned, for the place of ice and snow
Reason, is sure not directly by ice dissolution, because the water directly melted can freeze again at low temperature.
As the further scheme of the present invention：The power of electric steam generator described in step (10) is 24kW.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, method and step is simple, easy construction, construction quality are easy to ensure；
2nd, using effect is good and practical value is high.
Brief description of the drawings
Fig. 1 is the present invention to cast-in-situ box girder Winter Construction Methods FB(flow block) of being constructed.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
Referring to Fig. 1, in the embodiment of the present invention, a kind of cast-in-place winter construction method of Hanging Basket cantilever, it is comprised the following steps that：
(1) B1 grades of fire-retardant extruded sheets are pasted in the outer surface of hanging basket formwork flange plate, side form and bed die：Fire-retardant extruded sheet insertion
Template is in length and breadth between rib；
(2) hot water circuit pipeline is laid on the outside of fire-retardant extruded sheet：Hot water is laid with 25cm spacing on the outside of fire-retardant extruded sheet
Circulating line, conveys hot water by hot-water boiler and carries out circulating-heating, keep the temperature of template outer space；The hot water follows
Endless tube road uses diameter 20mm floor heating pipes；
(3) extruded sheet and hot water circuit pipeline are fixed on rib in length and breadth by the way that reinforcing bar point is welded in template：Using 8 reinforcing bars of Φ with
Template in length and breadth fix by rib spot welding；During the fixation extruded sheet using 8 reinforcing bar spot welding of Φ, electric spark should be avoided to touch extruded sheet；
(4) cantilever segment is integrally wrapped up using canvas：Cantilever segment template appearance fixes extruded sheet and hot-water circulation pipe
It is overall to be wrapped up using canvas behind road, ensure the overall wind shielding effect of box girder segment, reduce the convection current with outside air, it is ensured that is new
Pour the heat-accumulating and-keeping effect of beam section；The canvas is respectively to set binding strap 1, binding strap containing duck, canvas periphery spacing 50cm
It should not leaked out away from canvas edge 30cm with ensuring that adjacent canvas is overlapping after binding；Cantilever end end canvas with along bridge to from the wing
Listrium both sides, which hang, forms the keeping warmth space of closing after canvas is bound；To prevent strong wind from canvas is blown off or being scratched, on the inside of canvas
Binding strap should bind firm with hanging basket formwork；
(5) electric heating impact gun heats beam body template and reinforcing bar：Ensure concrete enter mould front template, reinforcing bar temperature is not less than
5 DEG C, in addition, casting concrete surface pour leaching with hot water to upper segment cantilever end section, ensure engaging portion between segment
Temperature is more than 5 DEG C；The electric heating impact gun is 30kW industrial air heaters；
(6) temperature measuring point is arranged：Set temperature sensor is arranged as temperature measuring point, temperature measuring point in box beam before concreting
Worst position is being kept the temperature, in case carrying out temperature monitoring during maintenance to beam body concrete, i.e., flange plate left and right sides respectively sets 1, top
1 is set in plate, 1 is set in bottom plate, each at the web of left and right to set 2, one group amounts to 8 temperature measuring points, using thermometric line,
Web and bottom plate thermometric line are uniformly guided in chamber, and top plate thermometric line is drawn by top plate；The temperature of the temperature sensor monitors
Have：Each observation station temperature in outside air temperature, case indoor air temperature, concrete opening temperature, concrete molding temperature and box beam entity
Degree；
(7) segment concrete is poured：Concreting selection is carried out in the day temperature higher period, is conducive to concrete and is entered
The control of mould temperature, the concrete molding temperature are 5~30 DEG C；Arrangement of time is poured in morning 9 on daytime:00 to afternoon 16:
00；Before pouring, the residue on reinforcing bar and template is cleaned, the processing for ice and snow, is sure not directly by ice dissolution, because directly
Connecing the water of thawing can freeze again at low temperature；
(8) film and cotton-wadded quilt covering newly pour beam section concrete：The relatively thin easily heat dissipation of structure is endured cold at box beam flange plate,
On the edge of a wing, plate top surface first covers layer of plastic film, then installs electric blanket additional on it, then covers cotton-wadded quilt, to strengthen flange plate portion
Position insulation；
(9) two cantilever end of box beam T structures is using fire prevention rock cotton board closure；
(10) heated up in chamber using coal stove, while steam is conveyed into chamber using electric steam generator：Altogether 4
Platform coal stove, daily coal fire furnace roof place a stainless steel bucket, play humidification and thermogenic action；Pour in rear cabinet room and persistently add
It is hot and steam-cured, ensure to provide humidity with steam while temperature, it is ensured that the temperature inside the box is not less than 5 DEG C, and keeps case indoor temperature
Substantially constant；Gas poisoning and the excessive carbonization for accelerating concrete of gas concentration lwevel in order to prevent, must be the exhaust of stove
Outside pipe outlet box room；The power of the electric steam generator is 24kW；
(11) tensioning mud jacking：Hanging Basket segment concrete strength carries out tensioning mud jacking after reaching design requirement, and mud jacking mix is used
Water uses mixing plant hot-water supply, and temperature ensures slurry temperature more than 15 DEG C, while prevent that temperature is excessive right at 30 DEG C or so
Slurry impacts, and with 48h after mud jacking during mud jacking, the temperature of structural concrete must not be less than 5 DEG C, and insulation should extend to
After grouting and intensity reach 25MPa after could stop, duct grouting should carry out under positive temperature, before its intensity reaches 25MPa, no
It must endure cold, the quality accident being damaged by frost in order to prevent after box beam concrete grouting occurs, and spy is pressed using low temperature resistant grouting material
Test block test is starched, to ensure squeezing quality.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference numeral in claim should not be considered as to the involved claim of limitation.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical solution, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (9)
- A kind of 1. cast-in-place winter construction method of Hanging Basket cantilever, it is characterised in that it is comprised the following steps that：(1) fire-retardant extruded sheet is pasted in the outer surface of hanging basket formwork flange plate, side form and bed die：Fire-retardant extruded sheet embedded template is in length and breadth Between rib；(2) hot water circuit pipeline is laid on the outside of fire-retardant extruded sheet：Hot water circuit is laid with 25cm spacing on the outside of fire-retardant extruded sheet Pipeline, conveys hot water by hot-water boiler and carries out circulating-heating, keep the temperature of template outer space；(3) extruded sheet and hot water circuit pipeline are fixed on rib in length and breadth by the way that reinforcing bar point is welded in template：Using 8 reinforcing bars of Φ and template Rib spot welding in length and breadth is fixed；(4) cantilever segment is integrally wrapped up using canvas：After cantilever segment template appearance fixes extruded sheet and hot water circuit pipeline, It is overall to be wrapped up using canvas, ensure the overall wind shielding effect of box girder segment, reduce the convection current with outside air, it is ensured that newly pour beam section Heat-accumulating and-keeping effect；(5) electric heating impact gun heats beam body template and reinforcing bar：Ensure that concrete is entering mould front template, reinforcing bar temperature not less than 5 DEG C, In addition, to upper segment cantilever end section, casting concrete surface pour leaching with hot water, ensures engaging portion temperature between segment More than 5 DEG C；(6) temperature measuring point is arranged：For set temperature sensor as temperature measuring point, temperature measuring point is arranged in guarantor in box beam before concreting The worst position of temperature, in case carrying out temperature monitoring during maintenance to beam body concrete, i.e. flange plate left and right sides respectively sets 1, in top plate 1 is set, 1 is set in bottom plate, respectively sets 2 at the web of left and right, one group amounts to 8 temperature measuring points, using thermometric line, web And bottom plate thermometric line is uniformly guided in chamber, top plate thermometric line is drawn by top plate；(7) segment concrete is poured：Concreting selection is carried out in the day temperature higher period, is conducive to concrete and is entered mould temperature The control of degree；(8) film and cotton-wadded quilt covering newly pour beam section concrete：The relatively thin easily heat dissipation of structure is endured cold at box beam flange plate, in the wing Listrium top surface first covers layer of plastic film, then installs electric blanket additional on it, then covers cotton-wadded quilt, to strengthen flange plate position guarantor Temperature；(9) two cantilever end of box beam T structures is using fire prevention rock cotton board closure；(10) heated up in chamber using coal stove, while steam is conveyed into chamber using electric steam generator：4 coals altogether Stove, daily coal fire furnace roof place a stainless steel bucket, play humidification and thermogenic action；Pour in rear cabinet room continuous heating and It is steam-cured, ensure to provide humidity with steam while temperature, it is ensured that the temperature inside the box is not less than 5 DEG C, and keeps case indoor temperature basic It is constant；Gas poisoning and the excessive carbonization for accelerating concrete of gas concentration lwevel in order to prevent, must draw the exhaust pipe of stove Outside outlet room；(11) tensioning mud jacking：Hanging Basket segment concrete strength carries out tensioning mud jacking after reaching design requirement, and mud jacking mixing water is adopted With mixing plant hot-water supply, temperature ensures slurry temperature more than 15 DEG C, while prevent temperature excessive to slurry at 30 DEG C or so Impact, with 48h after mud jacking during mud jacking, the temperature of structural concrete must not be less than 5 DEG C, and insulation should extend to grouting Afterwards and intensity reach 25MPa after could stop, duct grouting should carry out under positive temperature, must not be by before its intensity reaches 25MPa Freeze, the quality accident being damaged by frost in order to prevent after box beam concrete grouting occurs, and spy carries out mud jacking examination using low temperature resistant grouting material Block is tested, to ensure squeezing quality.
- 2. a kind of cast-in-place winter construction method of Hanging Basket cantilever according to claim 1, it is characterised in that institute in step (1) It is B1 grades of fire-retardant extruded sheets to state extruded sheet.
- 3. a kind of cast-in-place winter construction method of Hanging Basket cantilever according to claim 1, it is characterised in that institute in step (2) The hot water circuit pipeline stated uses diameter 20mm floor heating pipes.
- 4. a kind of cast-in-place winter construction method of Hanging Basket cantilever according to claim 1, it is characterised in that institute in step (3) When stating using 8 reinforcing bar spot welding of Φ fixation extruded sheet, electric spark should be avoided to touch extruded sheet.
- 5. a kind of cast-in-place winter construction method of Hanging Basket cantilever according to claim 1, it is characterised in that institute in step (4) It is containing duck to state canvas, and canvas periphery spacing 50cm respectively sets binding strap 1, and binding strap should be away from canvas edge 30cm, with true Protect and overlapping after the binding of adjacent canvas do not leak out；Cantilever end end canvas with along bridge to from flange plate both sides hang canvas binding after shape Into the keeping warmth space of closing；To prevent strong wind from canvas is blown off or being scratched, binding strap should bind jail with hanging basket formwork on the inside of canvas Gu.
- 6. a kind of cast-in-place winter construction method of Hanging Basket cantilever according to claim 1, it is characterised in that institute in step (5) It is 30kW industrial air heaters to state electric heating impact gun.
- 7. a kind of cast-in-place winter construction method of Hanging Basket cantilever according to claim 1, it is characterised in that institute in step (6) The temperature for stating temperature sensor monitors has：Outside air temperature, case indoor air temperature, concrete opening temperature, concrete molding temperature with And each observation station temperature in box beam entity.
- 8. a kind of cast-in-place winter construction method of Hanging Basket cantilever according to claim 1, it is characterised in that institute in step (7) Concrete molding temperature is stated as 5~30 DEG C；Arrangement of time is poured in morning 9 on daytime:00 to afternoon 16:00；Before pouring, to clean Residue on reinforcing bar and template, the processing for ice and snow, is sure not directly by ice dissolution, because the water directly melted is in low temperature Under can freeze again.
- 9. a kind of cast-in-place winter construction method of Hanging Basket cantilever according to claim 1, it is characterised in that institute in step (10) The power for stating electric steam generator is 24kW.
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| CN201611000135.3A CN106592430B (en) | 2016-11-14 | 2016-11-14 | A kind of cast-in-place winter construction method of Hanging Basket cantilever |
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| CN107503297A (en) * | 2017-09-12 | 2017-12-22 | 中建八局第三建设有限公司 | Basket protection maintenance canopy integrated with beam body steam curing and its construction method |
| CN107721331B (en) * | 2017-10-19 | 2021-05-18 | 清华大学 | Method for guaranteeing hydration process of concrete expansion joint construction in severe cold area |
| CN108018779A (en) * | 2017-11-30 | 2018-05-11 | 苏交科集团股份有限公司 | Concrete construction method under a kind of low temperature difference environment |
| CN111519540A (en) * | 2020-04-29 | 2020-08-11 | 中国水利水电第八工程局有限公司 | Continuous beam cantilever heat preservation construction equipment |
| CN111927125A (en) * | 2020-06-19 | 2020-11-13 | 中铁隧道集团二处有限公司 | Concrete winter maintenance construction method |
| CN113027156A (en) * | 2021-03-10 | 2021-06-25 | 中铁二十局集团第六工程有限公司 | Maintenance system is used in case roof beam winter construction |
| CN112854748A (en) * | 2021-03-10 | 2021-05-28 | 中铁二十局集团第六工程有限公司 | Maintenance method for construction of suspension casting box girder in winter |
| CN114525741A (en) * | 2022-02-19 | 2022-05-24 | 中铁二十局集团第六工程有限公司 | Beam body heat insulation construction method adjacent to existing line cantilever beam |
| CN114657897A (en) * | 2022-02-19 | 2022-06-24 | 中铁二十局集团第六工程有限公司 | Heat-insulating construction method for suspension cast beam in alpine region |
| CN114657898A (en) * | 2022-02-19 | 2022-06-24 | 中铁二十局集团第六工程有限公司 | Construction method for cantilever beam in alpine region |
| CN114673159A (en) * | 2022-05-07 | 2022-06-28 | 华能鹤岗发电有限公司 | Concrete heat preservation construction method for winter construction |
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| KR100373402B1 (en) * | 2000-11-08 | 2003-03-03 | (주)서영기술단 | Dry apparatus of bridge slab in the winter season |
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